Method for determining resin penetration into at least one porous coating material

Patent metadata

Field	Value
Publication number	US-12504367-B2
Application number	US-202218278089-A
Country	US
Kind code	B2
Filing date	Feb 15, 2022
Priority date	Feb 24, 2021
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

Provided is a method for determining the resin penetration into at least one porous coating material which is pressed with at least one carrier board and at least one resin layer arranged on the carrier board. During the pressing process the resin penetrates or rises into the at least one porous coating material.

First claim

The invention claimed is:

1 . A method for determining the resin penetration into at least one porous coating material which is pressed with at least one carrier board and at least one resin layer, wherein the at least one resin layer is arranged on the carrier board and the at least one porous coating material is arranged on the at least one resin layer, wherein during the pressing process the resin penetrates or rises into the at least one porous coating material,
comprising the steps of recording of at least one NIR spectrum of several reference samples each having different values for resin penetration into a porous coating material using at least one NIR measuring head in a wavelength range between 500 nm and 2500 nm; determining the resin penetration into the porous coating material of the mentioned reference samples by means of a mechanical removal of the porous material surface; correlating the resin penetration determined by mechanical removal with the recorded NIR spectra of said reference samples; and creating a calibration model for the correlation between the spectral data of the NIR spectra and the corresponding resin penetrations of the reference samples by means of multivariate data analysis; pressing of at least one porous coating material with at least one carrier board and at least one resin layer arranged on the carrier board, recording at least one NIR spectrum of the porous coating material pressed with the carrier board and the resin layer using the at least one NIR measuring head in a wavelength range between 500 nm and 2500 nm; and determining the resin penetration into the at least one porous coating material by comparing the NIR spectrum recorded for the porous coating material with the calibration model created.

2 . The method according to claim 1 , wherein the at least one resin layer comprises a resin-impregnated paper layer, a resin-containing powder or a resin-containing liquid.

3 . The method according to claim 1 , wherein the at least one resin layer comprises a resin-impregnated paper layer having resin powder applied thereto.

4 . The method according to claim 3 , wherein the resin powder is applied to the resin-impregnated paper layer in an amount between 10 and 80 g/m 2 .

5 . The method according to claim 3 , wherein the resin powder is applied to the resin-impregnated paper layer in an amount between 15 and 50 g/m 2 .

6 . The method according to claim 1 , wherein at least one additive is applied to the at least one resin layer.

7 . The method according to claim 6 , wherein the at least one additive is selected from the following group comprising dyes (e.g. ink), pigments (e.g. color pigments, metallic pigments or reflective pigments), flame retardants (ammonium polyphosphate, tris(tri-bromo neopentyl) phosphate, zinc borate or boric acid complexes of polyhydric alcohols), agents for increasing conductivity, UV stabilizers, bleaching agents, hydrophobing agents or antimicrobial agents.

8 . The method according to claim 6 , wherein the at least one additive is a dye.

9 . The method according to claim 1 , wherein the at least one carrier board is a board made of a wood material, of plastic, a wood material-plastic mixture or a composite material, a cement fibre board, gypsum fibre board or WPC board (wood plastic composites) or a SPC-board (stone plastic composites).

10 . The method according to claim 9 , wherein the wood material is a particle board, medium-density fibre (MDF)-, high-density fibre (HDF)-, oriented strand (OSB)- or plywood board.

11 . The method according to claim 1 , wherein the at least one porous coating material comprises at least one veneer layer, leather material, felt material, non-woven material and/or such materials which have a porosity in which liquid resin can rise during pressing and which are at least partially plastically deformable.

12 . The method according to claim 1 , wherein the at least one carrier board, the at least one resin layer disposed on the carrier board and the at least one porous coating material are compressed at temperatures between 150 and 200° C., at a pressure of 30 to 50 kg/cm 2 .

13 . The method according to claim 1 , wherein spectral data from the entire recorded spectral range are used to create the calibration model.

14 . The method according to claim 1 , wherein spectral data from the NIR spectral range between 1450 nm and 1550 nm are used for the creating the calibration model, which are pre-treated by means of suitable mathematical methods and are subsequently fed to the multivariate data analysis.

15 . The method according to claim 1 , wherein the determination of the resin penetration into the porous coating material is carried out continuously and online.

16 . The method according to claim 1 , wherein the wavelength range is between 700 nm and 2000 nm.

17 . The method according to claim 1 , wherein the wavelength range is between 900 nm and 1700 nm.

18 . The method according to claim 1 , wherein the wavelength range is between 1450 nm and 1550 nm.

19 . The method according to claim 1 , wherein the at least one carrier board, the at least one resin layer disposed on the carrier board and the at least one porous coating material are compressed at temperatures between 17° and 180° C., at a pressure of 40 kg/cm 2 for 60 to 90 seconds.

Assignees

• Flooring Technologies Ltd

Inventors

• Hasch Joachim
• Kalwa Norbert
• Zhang Jinming

Classifications

• G01N2201/127

  Calibration; base line adjustment; drift compensation · CPC title

• G01N33/442

  Resins; Plastics · CPC title

• G01N21/3563

  for analysing solids; Preparation of samples therefor · CPC title

• G01N2021/8472

  Investigation of composite materials · CPC title

• G01N21/8422

  Investigating thin films, e.g. matrix isolation method · CPC title